package ooday01;

//构造方法的演示
public class ConsDmeo {
    public static void main(String[] args) {
        Student sc = new Student();
        Student a = new Student("mjh", 18);
        Student b = new Student("mjh", 18, "jdk2302", "001");
        a.study();
        b.sayHi();
    }
}

